---
title: "Add Crossorigin Attributes to External Resources for Better Security | bseoa"
description: "External resources on your page are missing the crossorigin attribute. This attribute is important for security when loading resources from other domains, as i…"
image: "https://www.blackseoanalyzer.com/static/images/black-seo-analyzer-og-image.png"
canonical: "https://www.blackseoanalyzer.com/en/technical-seo/security-analyzer/missing-crossorigin-attribute"
language: "en"
---

# Add Crossorigin Attributes to External Resources for Better Security

Security Analyzer

## What is this warning?

External resources on your page are missing the `crossorigin` attribute. This attribute is important for security when loading resources from other domains, as it controls how the browser handles CORS (Cross-Origin Resource Sharing) and can prevent certain types of attacks.

## How to Fix This Issue

### How to Fix It

#### The Problem

```
<script src="https://cdn.example.com/library.js"></script>
<link rel="stylesheet" href="https://fonts.googleapis.com/css?family=Open+Sans">
```

#### The Solution

Add the `crossorigin` attribute to external resources, especially when using integrity checks or when the resource needs CORS handling.

```
<script src="https://cdn.example.com/library.js" crossorigin="anonymous"></script>
<link rel="stylesheet" href="https://fonts.googleapis.com/css?family=Open+Sans" crossorigin="anonymous">
```

#### Why This Works

The `crossorigin` attribute ensures proper CORS handling, enables integrity checking for CDN resources, and provides better error reporting for cross-origin resources.

### SEO Impact

This issue can affect your site's search engine rankings and user experience. Addressing it promptly helps ensure optimal performance and visibility in search results.

### Automatic Detection

bseoa automatically checks for this warning during site analysis, along with hundreds of other technical SEO issues.

## Other Security Analyzer issues

- [Add Input Validation to Credit Card Fields for Better Security](https://www.blackseoanalyzer.com/en/technical-seo/security-analyzer/credit-card-field-missing-pattern)
- [Disable Autocomplete on Sensitive Form Fields to Protect User Data](https://www.blackseoanalyzer.com/en/technical-seo/security-analyzer/sensitive-field-autocomplete)
- [Eliminate Mixed Content to Keep Your Site Secure](https://www.blackseoanalyzer.com/en/technical-seo/security-analyzer/mixed-content)
- [Fix Content Security Policy Issues to Strengthen Site Security](https://www.blackseoanalyzer.com/en/technical-seo/security-analyzer/content-security-issue)
- [Protect Your Forms from CSRF Attacks with Anti-CSRF Tokens](https://www.blackseoanalyzer.com/en/technical-seo/security-analyzer/form-missing-csrf-protection)
- [Remove Dangerous Patterns from Inline Scripts to Prevent XSS](https://www.blackseoanalyzer.com/en/technical-seo/security-analyzer/dangerous-pattern-in-inline-script)
- [Remove Unsafe Content to Improve Site Security](https://www.blackseoanalyzer.com/en/technical-seo/security-analyzer/recommendation-to-remove-unsafe-content)
- [Replace Inline Event Handlers with Safer Alternatives](https://www.blackseoanalyzer.com/en/technical-seo/security-analyzer/inline-event-handler)
- [Secure External Resources by Using HTTPS](https://www.blackseoanalyzer.com/en/technical-seo/security-analyzer/insecure-external-resource)
- [Secure Your Forms by Using HTTPS for Form Submissions](https://www.blackseoanalyzer.com/en/technical-seo/security-analyzer/insecure-form-action)
- [Strengthen Your Site's Defense Against XSS with a Content Security Policy](https://www.blackseoanalyzer.com/en/technical-seo/security-analyzer/inline-script-without-nonce)
- [Use addEventListener for Better Security and Code Organization](https://www.blackseoanalyzer.com/en/technical-seo/security-analyzer/recommendation-to-use-addeventlistener)
- [Use Proper Input Type for Password Fields to Enhance Security](https://www.blackseoanalyzer.com/en/technical-seo/security-analyzer/password-field-not-type-password)
- [Use Subresource Integrity (SRI) to Secure Your CDN Assets](https://www.blackseoanalyzer.com/en/technical-seo/security-analyzer/cdn-resource-missing-integrity)

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